from tkinter import *
import time
def ballMove(event):
    if event.keysym=='Left':
        canvas.move(1,-5,0)
    if event.keysym=='Right':
        canvas.move(1,5,0)
    if event.keysym=='Up':
        canvas.move(1,0,-5)
    if event.keysym=='Down':
        canvas.move(1,0,5)
tk=Tk()
canvas=Canvas(tk,width=500,height=300)
canvas.pack()
canvas.create_oval(225,125,275,175,fill='red')
canvas.bind_all('<KeyPress-Left>',ballMove)
canvas.bind_all('<KeyPress-Right>',ballMove)
canvas.bind_all('<KeyPress-Up>',ballMove)
canvas.bind_all('<KeyPress-Down>',ballMove)
mainloop()